MAJESTIC SPIRE: The Bank of America Tower is now illuminated at night, shifting from blue to green to gold, thanks to energy-efficient lights from Philips.

MAJESTIC SPIRE: The Bank of America Tower is now illuminated at night, shifting from blue to green to gold, thanks to energy-efficient lights from Philips.

The City That Never Sleeps has a new reason to stay up at night.

In the past few days, without fanfare, the Durst Organization lit up the previously dark spire atop 1 Bryant Park, aka the Bank of America Tower, at Sixth Avenue and 42nd Street. The ornamental shaft — rising to 1,200 feet, taller than the Chrysler Building’s — now pulsates from blue to green to gold.

At the same time, the broadcast antenna of developer Douglas Durst‘s 4 Times Square next door was similarly illuminated in a surprise move, making for a choreographed duet above 42nd Street. Although Durst was known to be planning something fun for the top of 1 BP, he’d kept the work on 4 TS under wraps.

The effect is arresting from any vantage point. Viewed from the Queens waterfront, for example, 1 BP appears to be courting the Chrysler Building in a graceful pas de deux.

Eventually, Durst told us, he hopes the tower tops will “play off” a proposed illuminated spire at 1 World Trade Center downtown, where he’s partnering with the Port Authority. The 1 WTC shaft will reach to a symbolic 1,776 feet above ground.

Durst’s $3.5 million Midtown lighting scheme was created by Cline Bettridge Bernstein Lighting Design and installed during the course of a year by Fred Geller Electrical. The spires are lit from dusk to midnight. Like the rest of 1 Bryant Park, which is LEEDS Platinum-Certified, the lights are energy-efficient.

The 368 LED floodlights on the tower tops are made by Philips Color Kinetics. The total power consumption of about 18.4 KW is believed to be much less than at other illuminated skyscraper tops. scuozzo@nypost.com